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本文提出以甲基异丁基酮萃取分离铁,用mA测定稀土总量,并采用磷酸-草酸-焦磷酸钠体系,在钇组元素存在下用mN测定铈组稀土元素及减差法求化组元素含量的光度测定方法。本法对不同比例(5+1)、(1+1)及(1+5)的轻重混合稀土,以mA测其稀土总量,其比耳定律范围在25毫升体积内均为0～16微克,且三线的斜率较靠近;以mN测定铈组稀土分量的比耳定律范围在25毫升体积内为0～12微克,这样就有可能以轻重混合稀土比例为(1+1)的检量线来查得以上比例范围内一些无法得知轻重混合稀土组份的含量。
In this paper, iron is extracted with methyl isobutyl ketone, and the total amount of rare earths is determined by mA. The rare earth elements in the cerium group are determined by mN in the presence of elements of yttrium group Determination of elemental content of the photometric method. This law for different proportions (5 +1), (1 +1) and (1 +5) light rare earth, measured in mA total rare earth, its law of ear law in the volume of 25 ml are 0 to 16 Micrograms and the slope of the three lines is relatively close. The Beer’s Law, determined by mN for the rare earths in the cerium group, ranges from 0 to 12 micrograms in a volume of 25 microliters. This makes it possible to calibrate the ratio of light to heavy rare earths to (1 + 1) Line to check the proportion of some of the above range can not be informed of the content of light and heavy mixed rare earth components.